jvm 1    | java.lang.NullPointerException
 jvm 1    |    at org.drftpd.slave.RootCollection.getRootForFile(RootCollection.java:154)
 jvm 1    |    at org.drftpd.slave.RootCollection.getFile(RootCollection.java:113)
 jvm 1    |    at org.drftpd.slave.Transfer.receiveFile(Transfer.java:219)
 jvm 1    |    at org.drftpd.slave.Slave.handleReceive(Slave.java:680)
 jvm 1    |    at org.drftpd.slave.Slave.handleCommand(Slave.java:534)
 jvm 1    |    at org.drftpd.slave.Slave.access$200(Slave.java:89)
 jvm 1    |    at org.drftpd.slave.Slave$1AsyncCommandHandler.run(Slave.java:842)
 jvm 1    |    at java.lang.Thread.run(libgcj.so.70)